I think a good start would be to establish port-projects for nearly
anything from freedesktop.org, esp nouveau, in your case.

Then, I have a question to all working for OS developement.
> Developping device drivers, such as 3D mode of nvidia card etc.,
> is very difficult now, because there is no documents abailable.
> However, if we try to develope OS, we have to meet this difficulty.
> How you are trying to solve this?
>